SR 520 - Floating Bridge and Landings Project - Sentinel lights

What are the sentinels?

The new SR 520 floating bridge has four large towers, called “sentinels,” that mark the east and west ends of the world’s longest floating bridge. The tallest one, at the bridge’s east end, rises 123 feet above the lake’s surface. These towers not only add an architectural flair to the bridge, but also serve a critical function, allowing crews access to the bridge’s pontoon platform for maintenance.

Sentinel lighting

We illuminate the sentinels from dusk to dawn with LED lights. Teal is the standard color. Many color combinations are possible, however, which allows us to change the display color to commemorate holidays or support public events or causes of community significance.

How can I request a color change?

If you are interested in changing the sentinel lights for a public event or cause, please fill out our Sentinel Lighting Change Request Form (pdf 375 kb) and submit it to SR520Bridge@wsdot.wa.gov. Sentinel light changes are intended to recognize holidays and national and local campaigns, organizations and events of public significance. We cannot accommodate requests related to private events or political or religious events or campaigns. Details about the lighting policy and request process are listed in the request form (pdf 375 kb).

What lighting changes are coming up?

A calendar of the month of February 2020 with the nights of February 6 through 9 and 24 through March 2 shaded in various colors representing different sentinel reservations.

Dates: Thursday, Feb. 6, through Monday, Feb. 10
Color: Red
Cause: National Wear Red Day - American Heart Association
Description: The SR 520 sentinels will shine red in support of the American Heart Association's National Wear Red Day (Friday, Feb. 7). This day helps raise awareness about cardiovasular diseases, which are the number one killer of women.

Dates: Monday, Feb. 24, through Monday, March 2
Color: Blue and green
Cause: National Eating Disorders Awareness Week - National Eating Disorders Association
Description: The SR 520 sentinels will be lit green and blue this week to support National Eating Disorders Awareness Week. Eating disorders have the highest mortality rate of any other mental health issue, making providing support and guidance to individuals and families struggling with this mental health issue so critically important.